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Microchip Technology 93LC76AT-E/SN
- Part No.:
- 93LC76AT-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC76AT-E/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,692
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Product details
Overview
93LC76AT-E/SN from Microchip Technology Inc. is an 8Kbit, 1024 × 8-bit organization serial EEPROM with Microwire-compatible 3-wire interface (CS, CLK, DI/DO), operating over 2.5–5.5V supply and rated for automotive temperature range (−40°C to +125°C). It features self-timed erase/write cycles, 1,000,000 endurance cycles, >200-year data retention, and power-on/off data protection - used in engine control units, ADAS sensor calibration storage, and automotive infotainment configuration memory.
For engineers reviewing the 93LC76AT-E/SN datasheet, 93LC76AT-E/SN pinout, 93LC76AT-E/SN application, or 93LC76AT-E/SN equivalent, key selection considerations include its automotive-grade qualification, dedicated 8-bit organization (no ORG pin), absence of PE/ORG pins, SOIC-8 package compatibility, and Microwire protocol timing compliance at VCC ≥ 2.5V.
Technical Context
This device implements a synchronous serial interface with chip-select–gated clocking and single-data-line bidirectional I/O (DI/DO). It uses a dedicated 8-bit memory map (1024 × 8) without programmable word-size logic - eliminating ORG and PE pins found only on 'C' variants. All instructions (READ, WRITE, ERASE, EWEN, EWDS, ERAL) are executed via 22-clock-cycle sequences with status polling via DO pin during write operations.
Internal power-on reset and voltage-detect circuitry (VPOR = 1.5V typical) ensure data integrity during brown-out conditions. The device enters Standby mode when CS is low, drawing ≤5 µA (I-temp) or ≤1 µA (E-temp) current, and supports sequential read without address retransmission while CS remains high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8-bit organization); fixed x8 mapping eliminates address-width ambiguity in firmware drivers. |
| Supply voltage | 2.5–5.5 V; supports direct connection to 3.3V or 5V automotive microcontroller I/O rails without level-shifting. |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO); requires no additional control lines or SPI mode configuration. |
| Write cycle time | 5 ms max (TWC); deterministic timing enables precise host-side timeout handling without polling overhead. |
| Endurance | 1,000,000 erase/write cycles; sufficient for lifetime logging in telematics or ECU parameter tuning applications. |
| Data retention | >200 years at 85°C; validated for long-term storage of calibration coefficients and safety-critical configuration data. |
| Temperature grade | Automotive (E): −40°C to +125°C; qualified per AEC-Q100 stress test requirements for under-hood deployment. |
Pinout & Package
8-lead SOIC (SN) package with standard 150-mil body width and 1.27 mm pitch. Pin 1 marked by laser dot; RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between commands; deselects device into ultra-low-power Standby mode. |
| 2 (CLK) | Serial Clock | Positive-edge synchronized; supports up to 3 MHz (VCC ≥ 4.5V); clock may pause mid-transfer without state loss. |
| 3 (DI) | Data Input | Accepts Start bit, opcode, address, and write data; tied to DO for single-wire bus implementations with external current-limiting resistor. |
| 4 (DO) | Data Output / Status | Tri-state output; delivers read data or Ready/Busy flag (low = busy) during erase/write; high-Z when CS low or idle. |
| 5 (VSS) | Ground | Reference return path for all I/O and internal logic; requires low-impedance PCB connection to minimize noise coupling. |
| 6–7 | Not connected | No internal connection; left unbonded in die; must remain floating or grounded per layout best practices. |
| 8 (VCC) | Power Supply | 2.5–5.5 V input; internal POR circuit asserts reset until VCC exceeds 1.5 V; decoupling capacitor required within 10 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or software delay loops; host initiates command and polls DO for completion. |
| Power-on/off data protection | Hardware-enforced write inhibition below VPOR threshold (1.5 V), preventing corruption during power ramp-up/down transients. |
| Sequential read mode | Enables continuous burst reads across consecutive addresses with single CS assertion - reduces transaction overhead by ~40% vs. random access. |
| Ready/Busy status on DO | Allows real-time monitoring of programming progress without dedicated status register or interrupt line - simplifies host driver design. |
| Pb-free & RoHS compliant | Matte tin finish meets automotive ELV directive; compatible with lead-free reflow profiles (J-STD-020, peak 260°C). |
Applications
| Engine Control Unit (ECU) Trim Storage | ADAS Camera Calibration Data |
|---|---|
Use Scenario: Storing fuel injection timing offsets, spark advance tables, and OBD-II diagnostic fault codes that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to 16-bit automotive MCU via GPIO-banged Microwire; accessed during boot and runtime calibration updates. Use Value: Guaranteed data integrity at 125°C ambient enables reliable operation in engine bay mounting locations without thermal derating. | Use Scenario: Holding lens distortion coefficients, pixel mapping matrices, and exposure compensation parameters for surround-view camera systems. IC Role / Device Role / Timing Role: Dedicated calibration data repository; written once during factory setup and read at system startup; accessed via same MCU SPI peripheral routed to Microwire pins. Use Value: 1M endurance supports field recalibration via service tools without premature wear-out concerns. |
| Infotainment System UI Settings | Body Control Module (BCM) Configuration |
Use Scenario: Retaining user preferences (volume, display brightness, language, Bluetooth pairing keys) across vehicle power-down events. IC Role / Device Role / Timing Role: Low-power serial EEPROM sharing bus with other peripherals; accessed during system initialization and settings change events. Use Value: 5 µA standby current (E-temp) minimizes battery drain during extended parking periods - critical for always-on connectivity features. | Use Scenario: Storing door lock logic, lighting profiles, window auto-up/down thresholds, and seat position memories in centralized BCM. IC Role / Device Role / Timing Role: Robust nonvolatile storage element interfaced to 8-bit automotive MCU; withstands repeated power cycling during vehicle entry/exit sequences. Use Value: >200-year data retention ensures configuration persistence over full vehicle lifecycle (15+ years) without refresh. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76BT-E/SN | 16-bit organization (512 × 16); identical pinout, voltage, temp, and timing specs - but requires firmware address/data width adaptation. | Suitable where MCU firmware already handles 16-bit word-aligned access or memory density efficiency is prioritized over byte-level granularity. | Select only if existing software stack supports x16 addressing; not drop-in for x8 firmware without modification. |
| AT25DF041A-SHN-T | 4 Mbit SPI NOR Flash (not EEPROM); quad I/O capable; lacks built-in erase/write endurance management; requires external sector erase commands. | Better suited for firmware code storage or large log buffers; unsuitable for frequent small-parameter writes due to 100k-cycle endurance and 4 kB minimum erase block. | Choose only for read-mostly applications with infrequent updates; avoid for calibration or configuration storage requiring high write endurance. |
Compared with 93LC76BT-E/SN, the 93LC76AT-E/SN provides native byte-addressable access without firmware remapping; versus AT25DF041A-SHN-T, it delivers guaranteed 1M-cycle endurance and automatic erase-before-write - essential for automotive parameter storage with daily update cycles.
Availability
93LC76AT-E/SN is available at Aetrix Electronics and suitable for automotive electronics, engine control units, and ADAS subsystems requiring stable component supply with long-term lifecycle assurance.
Supply support for 93LC76AT-E/SN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and memory solutions, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The 93LCxx series was designed specifically for cost-sensitive, low-power automotive and industrial applications requiring robust serial nonvolatile memory with Microwire compatibility and AEC-Q100 qualification.
FAQ
What is the memory organization of the 93LC76AT-E/SN?
The 93LC76AT-E/SN has a fixed 1024 × 8-bit (8 Kbit) organization. Unlike 'C' variants, it does not feature an ORG pin - so word size is permanently set to 8 bits. This eliminates configuration uncertainty and simplifies firmware development for byte-oriented data structures.
Does the 93LC76AT-E/SN include Program Enable (PE) or ORG pins?
No. The 93LC76AT-E/SN is an 'A'-suffix device and therefore omits both PE and ORG pins. Programming is always enabled, and memory organization is fixed at 8-bit. Pins 6 and 7 are NC (no connect) - they must remain unconnected or grounded per PCB layout guidelines.
What is the maximum clock frequency supported by the 93LC76AT-E/SN?
The 93LC76AT-E/SN supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V, 2 MHz at 2.5–4.5 V, and 1 MHz at 1.8–2.5 V. Since this part is rated for 2.5–5.5 V operation, its practical maximum is 3 MHz - enabling fast parameter loading in time-critical automotive boot sequences.
How does the 93LC76AT-E/SN handle power-loss during write operations?
The 93LC76AT-E/SN incorporates hardware power-loss protection: its internal voltage detector (VPOR = 1.5 V typical) disables all write functions when VCC drops below this threshold. Combined with automatic erase-before-write and self-timed cycles, this ensures no partial writes or data corruption occurs during brown-out or rapid power removal.
Is the 93LC76AT-E/SN pin-compatible with other 93LC76x variants in SOIC-8 package?
Yes - the 93LC76AT-E/SN shares identical SOIC-8 (SN) pinout with 93LC76BT-E/SN and 93LC76CT-E/SN. However, pin functionality differs: 'B' variants retain same pinout but interpret address/data as 16-bit; 'C' variants add ORG and PE on pins 6 and 7. Thus, only 'A' and 'B' variants are hardware-swappable; 'C' requires PCB redesign.
93LC76AT-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC76AT-E/SN FAQ
1.How can I place an order for 93LC76AT-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76AT-E/SN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 93LC76AT-E/SN reliable?
The price and inventory of 93LC76AT-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC76AT-E/SN is usually 5 days.
3.What payment methods are accepted for 93LC76AT-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76AT-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76AT-E/SN?
93LC76AT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76AT-E/SN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 93LC76AT-E/SN?
For technical support, including 93LC76AT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76AT-E/SN requirements.
6.How does Aetrix verify that 93LC76AT-E/SN is sourced from the original manufacturer or authorized distributors?
All 93LC76AT-E/SN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 93LC76AT-E/SN meets industry standards.
7.What is the process for return or replacement of 93LC76AT-E/SN?
All 93LC76AT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76AT-E/SN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 93LC76AT-E/SN part is unused and in its original packaging.
Return procedure for 93LC76AT-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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